2138449 has 4 divisors (see below), whose sum is σ = 2168640. Its totient is φ = 2108260.

The previous prime is 2138429. The next prime is 2138467. The reversal of 2138449 is 9448312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2138449 - 2⁷ = 2138321 is a prime.

It is a super-4 number, since 4×2138449⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138449.

It is not an unprimeable number, because it can be changed into a prime (2138419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14989 + ... + 15130.

It is an arithmetic number, because the mean of its divisors is an integer number (542160).

2^2138449 is an apocalyptic number.

It is an amenable number.

2138449 is a deficient number, since it is larger than the sum of its proper divisors (30191).

2138449 is an equidigital number, since it uses as much as digits as its factorization.

2138449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30190.

The product of its digits is 6912, while the sum is 31.

The square root of 2138449 is about 1462.3436668581. The cubic root of 2138449 is about 128.8347341799.

The spelling of 2138449 in words is "two million, one hundred thirty-eight thousand, four hundred forty-nine".